I have a real problem trying to get to grips with the whole Optionals/wrapping thing, and associated type issues. Here's my code: import Quartz import Foundation func listFilters() -> Void { let theFilters = QuartzFilterManager.filters(inDomains: nil)! for eachFilter in theFilters as! [QuartzFilter] { print(eachFilter.localizedName()!, ":", eachFilter.url().path) } } listFilters() So, in the first line of the function, I have to explicitly force unwrap the result of the method that returns a list of QuartzFilters. (Why?) The very next line, I have to force them to be of type QuartzFilters, (because why wouldn't the method return the actual type of thing that they are?) And then on the third line, I still have to force unwrap one of the properties of something that I've already unwrapped (otherwise I get optionals), but not the other one. Yes, I understand it's all about trying to prevent a null condition, but nearly everything is never null. Even if I use if let on the first line, I'm still unwrapping stuff inside that if.

Apple seems to have archived its documentation for making PKG packages, and PackageMaker hasn't been seen since 2012. Are packages deprecated, or are there new ways for creating them?

Now that CUPS backends, filters and PPDs are deprecated, I'm trying to set up a print to file queue using ippeveprinter. But I can't get it to work. Anyone know anything about it? I've tried: ippeveprinter -D file:///Users/Shared/Print/Out -F application/pdf -c /usr/local/bin/pscommand.sh myprinter and then created a shell command that runs: cupsfilter $1 I've tried it without the -c flag as well. Sometimes I've produced .prn files, and occasionally .urf files (but without changing anything I've also got zero length files). But I just can't get a PDF into my destination folder.